Do crosswalks have to be marked?

“Crosswalk” means the portion of the roadway between the intersection area and a prolongation or connection of the farthest sidewalk line or in the event there are no sidewalks then between the intersection area and a line ten feet therefrom, except as modified by a marked crosswalk.

State law says drivers must stop and remain stopped to allow a pedestrian to cross the roadway within a crosswalk, unmarked or marked, “when the pedestrian us upon or within one lane of the half of the roadway upon which the vehicle is traveling or onto which it is turning.” (There are exceptions for curb ramps.)

But state law also clarifies that no pedestrian or bicycle shall suddenly leave a curb and move into the path of a vehicle that is so close that it is impossible for the driver to stop.